The drones are coming and not just by air either. In the next few years, an explosion of drones is expected to invade the U.S. by air, by water, and even underground. Here’s more from Robert Beckhusen at Wired.com:

It’s been 10 years since the Department of Homeland Security (DHS) started up operations. During that decade, DHS has moved to the forefront of funding and deploying the robots and drones that could be coming soon to a neighborhood near you.

DHS funds research and development for surveillance robots. It provides grant money by the hundreds of thousands to police agencies to buy their own. And sometimes it’s bought and deployed robots — for their skies, the ground and the waters — of its own, usually concentrated along the border. It’s not clear how many of those robots police operate, and law enforcement isn’t by any means the only domestic market for the ‘bots. But the trend lines point toward more robotic spy tools for law enforcement in more places — with more DHS cash.

But it’s not going to be simple. The Federal Aviation Administration is cautious about opening the skies to unmanned vehicles — so much so that Congress and the Obama administration ordered it to ease up on restrictions by 2015. But not all spy robots fly. DHS is also developing robots that resemble fish, and deploys tunnel-bots deep into drug-smuggling tunnels along the border…